i found this bug, (i think is a bug)
when i execute the command: /scoreboard teams add *, will add a team with each entity name in the world (that is listed in scoreboard). will get all names like scoreboard players reset *, but will add a team with all names (players or entity's UUID.
if i use /scoreboard teams remove *, will try to remove all teams with is listed in *.
if i use /scoreboard teams add test *, will try to add a team named test with the display name for each entity, but only one team will be added.

i try to use selectors like /scoreboard teams add @p, but will only add a team named @p. it only works using *
i don't know if it is a bug, but would be nice add teams using player name, like @p team (HeroProNight team), but will need to testfor a team using selectors. thanks for the attention